Abstract
The nonlinear conduction of polymeric insulation may solve the surface charge accumulation, avoiding the distortion of electric field and the flashover phenomenon. As the silicon carbide (SiC) powder is usually used to improve the nonlinear conduction of polymer composites, the epoxy/SiC nanocomposites are prepared and the dc conductivity, permittivity and isothermal surface potential decay characteristics are investigated. The experimental results show that the conduction of high filler loading is field dependent and is attributed to a new conduction mechanism. The permittivity is closely related to the interaction zone around nanoparticles. The isothermal surface potential decay characteristics are greatly affected by the charging polarity, charging level and filler loading. The investigation indicates that the nonlinear conduction plays an important role in the surface potential decay.
| Original language | English |
|---|---|
| Article number | 8120375 |
| Pages (from-to) | 3154-3164 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Dielectrics and Electrical Insulation |
| Volume | 24 |
| Issue number | 5 |
| DOIs | |
| State | Published - Oct 2017 |
Keywords
- Epoxy
- SiC
- interaction zone
- nanocomposite
- nonlinear conduction
- permittivity
- surface potential decay
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